hicp 1.1.0

Breaking changes:

1. Updated the package's default COICOP version to ECOICOP version 2 for HICP: options(hicp.coicop.version="ecoicop2.hicp").

2. Replaced the data set spec.aggs with the function spec.agg(), which gives the composition of special aggregates based on the selected COICOP version.

3. Replaced the data set countries with the function countries(), which gives the names and codes of all countries with HICP data.

4. Removed the global option options("hicp.coicop.bundles").
   In the new COICOP version ecoicop2.hicp, bundle codes are no longer used.
   The COICOP bundles previously used are still internally defined and considered for ecoicop1.hicp.

5. Made the function unbundle() a non-exported one.

6. Dropped the argument label from the function level().

New features and other changes:

1. Added the global option options("hicp.coicop.prefix") to allow COICOP codes to have a prefix like CP.

2. Added the functions is.ea(), is.eu() and is.eea() to indicate if a country belongs to one of the European aggregates.

3. Added the function is.spec.agg() to indicate if a code is a special aggregate.

4. Added the function label() to label all valid COICOP, bundle and special aggregate codes.

Bug fixes:

1. Corrected the use of settings$chatty in the function contrib().